[EN] DICHROIC AZO-AZOMETHINE DYES FOR LIQUID CRYSTAL COMPOSITIONS<br/>[FR] COLORANTS DICHROÏQUES D'AZO-AZOMÉTHINE POUR COMPOSITIONS À CRISTAUX LIQUIDES
申请人:BASF SE
公开号:WO2020156832A1
公开(公告)日:2020-08-06
Dichroic azo-azomethine dyes of formula (A) or (B), wherein Ar1 to Ar10 are specific (hetero)aromatic moieties and L is a linking group, as defined in the present claims, a dichroic dye mixture comprising said azo-azomethine dyes and a process for preparing the dyes are provided. The dyes are well suited for combination with liquid crystal material for use, inter alia, in a light absorption anisotropic element, for example,in a switchable optical device or an optically anisotropic film.
二色性偶氮偶亚甲基染料的化学式(A)或(B),其中Ar1至Ar10是特定的(杂)芳香基团,L是一个连接基团,如本申请中所定义的,提供了一种包括所述偶氮偶亚甲基染料的二色性染料混合物以及制备这些染料的方法。这些染料非常适合与液晶材料结合使用,例如,在光吸收各向异性元件中,例如,在可切换的光学器件或光学各向异性薄膜中。